Wiredrawing scale



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IH. O. HEMI WIRE DRAWING SCALE Filed Feb. 2.5 1920 2 Sheets-Shea?, 2

Patented May 1, 1923..

HALVOR C). `HEMI, OlE TOLEDO, OHIO, ASSGNOR TO TOLEDO SCALE COMPANY, OFTOLEDO, 0R10, ORPORATZEON OF NEW JERSEY.

` 'WUEREDRAWING SCALE.

` Application inea February 2.15, 192e. serial no. 361,249.

To all 't0/tom it mag/concern lde it known that I, Harmon O. HEM, acitizen of the `United States, residing at Toledo, in the countyof Lucasand tate y of Ohio, have invented certain new and useful Improvements inWiredrawing Scales, of whichthe following is aspeciication.

`'.[yhis invention relates to force` measuring instruments, particularlyinstruments designedto measure the force exerted indrawing a wirethrough a die, and one of its principal objects isto provide means`which indicate at all times; the tension upon thewire which is beingdrawn so `that the` speed of `the drawing machine iand other conditionsmaybe, properly regulated. ,y

nother object is the provision of an instrument of .thischaracterthaving a wide Capacity rangeso that it maybe used tomeasurethetension of wire of all gages.` i Still another.` `objllect isto provide` such an instrument haring meansl adapted to be set formeasuring afiXed majortportion of the force exerted in drawing a wireand auto! matic means for measuring and indicating `the;.variableremainder ofjsuch force.

.i `(tther objects and advantages will be` apparent fromvthe: followingdescription, in `which reference'is; had to the accompanying drawingsillustrating` a preferred embodi` ment of my invention and in whichsimilar` reference numerals designate similar parts throughout theseveral views. In the drawingsc- Figure` isa front elevation `of a forcemeasuningmachine embodying my invention-` l .i .Q A

Figure 2 isa side;` elevation thereof;` and Figure 3 is `aplan View ofthe die andthe parts immediately connected therewith.

Referring to the drawings in detail, the

die issupported upon a benchor analo` goussupport 1 which is providedwith a pair of guides 2 to permit limitedhorizon- `tal. movement of thedie. The die proper 8 is fixed upon a horizontal plate 4l, the edges ofwhich are;` contained in grooyes in the guides 2. "A pairof anms extendsupwardly and rearwardly .from1 the plate` .4r to form ameansforconnecting the die-.carryirngplate` to the leverl mechanism ofameasuringinstrument which 1s so arranged that the connectionis on a`levelwiththe opening in the die through which the wire A isdll-awnl-Iingedly `attached to the arms 5 is a bifurcated member 6`constituting a part of 'a link 7, the link 7 being made in two partsthreaded together so that its length may be conveniently adjusted. 'llheopposite end of the linlef is hingedly connected to the end of anupright arm 8 of the bell-crank lever 9 fulcrumed upon a bracket 10secured n upon the floor supporting the machine. The

other arm 11 of the bell-crank lever 9 extends horizontally so thathorizontal movement of the die 3 results in downward movement of thehorizontal arm 11 of the bell-orank lever. The free end ofthe arm 11carries `a knife edge pivot 12 which ein tends from both sides thereofand rests in aligned grooved bearings 13 carried in the bifurcatednpperend of a thrust member 111. The lower end of the member 111 is providedwith horizontal extensions lying` substantially at right angles to thebifurcations at the upperend ofthe member 14:.

`Ushaped yoke members 15, hauying their bight portions connected to the'horizontal extensions of the member 14 by means of vertically-extendingbolts and carrying aligned grooved bearings in their upper ends, serveto connect the member 14 to a horizontal lever 16. The horizontal lever`16 is substantially lf-shaped and its forked ends are provided withfulcrum pivots which rest in by the fulcrum stands 17. Owingtothe formof the member 141-, with upper forks and lower extensions extending inplanes at right angles to each other, a downward force may be exerted onthe thrust member 14 without danger of tilting it. l

`From the nose of the lever 16 a steelyard 18; extends upwardly toconnection withthe beam `lever 19 supported in a eabinet 20. Access tothe interior of the cabi net is had by means of an opening in the frontthereof, normally covered by a door 21.

The beam force measuring mechanism containedl in` the cabinet issubstantially the same as that shown in my Patent No. 1,423,660,patented duly 25,1922, and comprises in addition to the beam levervlyQga series ofunit weightsl 2Q and means to deposit them one by one upon acounterpoise grooved bearings supported` other elements of .theinvention.

pan 23 connected to the beam 19. Since my present invention does notreside in this weighing mechanism per se, I will not describe it indetail.

The cabinet 2O is surmounted by a head 25 having substantially the shapeof the casing of a watch and containing automatic force measuringmechanism of the type shown and described in the patent to Hapgood,1,203,611, November 7, 1916. Since this weighing mechanism per se is notof my invention,I will describe it only in such detail as will sufficeto show its connection with the It consists essentially of a pair ofoppositely-swinging pendulums 27, rigid with which are fulcrum sectors28 suspended by means of f'lexible ribbons from a :trame 29 contained inthe head 25. The pendulums 27 are Aalso provided with power sectors 30which are connected, by means of steel ribbons, to a hook rod 32extending downwardly and connected to the beam lever 19. An indicatinghand 33 is so connected to the pendulum mechanism as to move over thedial 34 when the pendulums swing upwardly and outwardly ,tocounterbalance the pull upon the die 3,

the dial 34 being graduated and marked so that the tension of the wireis indicated thereon in pounds. i

Intheoperation of the device, when it is used to indicate the amount offorceV exerted in drawing light wire, none of the unit weights 22 areplaced upon the counterpoise pan 23. The pull is transmitted through thebell-crank lever 9, the 'horizontal lever 16 and the beam lever 19 tothe pendulum mechanism in the head 25 and is indicated on the chart 34bythe indicating hand 33. When the instrument is used for measuring theforce exerted in drawing heavy wire, one or more unit weights are placedon the pan 23 and the major portion of the pull on the wire is thusmeasured bythe beam mechanism in the cabinet 20, leaving only thevariable remainder to be measured and indicated by the mechanism inthehead 25.

While it will be apparent that the illusltrated embodiment of myinvention herein disclosed is' lwell calculated to adequately fulfillthe objects primarily stated, it is to be understood that the inventionis susceptible to variation, modificationA and change within the spiritand 'scope of the subjoined claims. y Having described my invention, Iclaim?i 1. 'In wire drawingl apparatus, a movablemember adapted toengage a wire being drawn, and a force measuring instrumentoperatively-connected to said member to indicate the force exerted inmoving said member.

"'2. In a device of the class described, a ywire 'drawing die, a forcemeasuring instrument,

mechanism, and indicating mechanism connected thereto.

6. In a device of the class described, a die having horizontal movement,means for converting such horizontal movement into vertical movement,and gravity means for measuring the torce exerted in moving said die.

7. In a device et the class described, a die having horizontal movement,means for converting such horizontal movement into vertical movement,and pendulum mechanism for measuring the force exerted in moving saiddie.

8. In a device of the class described, a die having horizontal movement,a bell-crank lever connected thereto to convert horizontal force exertedto move said die into vertically acting force, and gravity-controlledmeans connected to said bell-crank lever to measure said torce.

9. In a device of the class described, a die having horizontal movement,a bell-crank lever connected thereto to convert horizontal force exertedto move said die into downwardly-acting force, and gravity-controlledmeans connected to said bell-crank lever to measure said torce.

10. In a device of the class described. a movable member adapted toengage a wire being drawn, means operatively connected to said member tooffset a. fixed maior portion of the force exerted in moving saidmember. and means to automatically offset the remainder of such force.

11. In a device of the class described, a wire drawing die capable ofbeing moved by the force exerted in drawing a wire therethrough, meansoperatively connected to said die to offset a fixed major portion of theforce exerted in drawing such wire, and means to automatically offsetthe remainder of such force.

12. In a device of the class described, in combination, a wire drawingdie, means including manually shiftable weights for offsetting a fixedmajor ortion of the force exerted in drawing a wire through said die.and automatic means for offsetting the variable remainder of such force.

13. ln a device of the class described7 in combination, a Wire drawingdie, means including manually `shiftable Weights for Oifsetting a iXedmajor portion of the force exerted in drawing a Wire through said die,and pendulum mechanism for oifsetting the variable remainder of suchforce.

14;. In a device ofthe class described, in combination, a Wire drawingdie, means including manually shitable Weights for oft'- setting a fixedmajor portion of the force exerted in drawing a Wire through said die,pendulum mechanism for ol'setting the var1- able remalnder of suchforce, and means for indicating in pounds the value of such majorportion and variable remainder of the force so o'set.

l5. 1n a device of the class described, in combination, a plate, a Wiredrawing die secured thereon, a pair of arms extending from said plate topoints symmetrically located with respect to the opening in said die,and force measuring mechanism connected to said arms.

HALVUR 0. HEM. Witnesses:

C. E. Willcox,

C. O., MAneHALn,

